what I think is right? the ideas and intension of MAL optimizers contain
three parts: 1. programming language/compiler optimization 2. databose query
optimization 3. some optimization only for column-oriented database but not
for row-oriented database,such as mitosis,mergtable,dataflow etc.as a who
Thanks very much, you means the ideas and intension of MAL optimizers
contain three parts: 1. programming language/compiler optimization 2.
databose query optimization 3. some optimization only for column-oriented
database but not for row-oriented database,such as
mitosis,mergtable,dataflow etc
Bes
The ideas / intension of some MAL optimizers, such as alias removal, dead
code elimination, (to some extend) join ordering, etc. are generic and
traditional, both in database query optimization and progarmming language /
compiler optimization. The genral optimizer design and architecture
combinin
Thanks，professor Stefan Manegold,when I use explain,I get the optimizer MAL
plan.
I have another question, so we know that many classic optimizer for
row-oriented database，and can I say the MAL optimizer is unique for
column-oriented database such as MonetDB? or some of MAL optimizer is unique
for
On Wed, Aug 11, 2010 at 04:23:42PM +0800, kun ren wrote:
> I read sql_optimizer setting in monetdb5.conf ,and default setting is:
> sql_optimizer=default_pipe
> default_pipe=inline,remap,evaluate,costModel,coercions,emptySet,aliases,mitosis,mergetable,deadcode,commonTerms,joinPath,reorder,deadcode,
I read sql_optimizer setting in monetdb5.conf ,and default setting is:
sql_optimizer=default_pipe
default_pipe=inline,remap,evaluate,costModel,coercions,emptySet,aliases,mitosis,mergetable,deadcode,commonTerms,joinPath,reorder,deadcode,reduce,garbageCollector,dataflow,history,multiplex
so there ar
Yes, if you write MAL "by hand" (or have some program create it) that does
explicitly call a MAL optimizer, that MAL optimizer is indeed used to
optimize the MAL code according to its very purpose.
Stefan
On Wed, Aug 11, 2010 at 03:49:47PM +0800, kun ren wrote:
> It is only used by SQL? and how t
It is only used by SQL? and how to designation the optimiser？but when I
write MAL,for example,
i:=0;
b:= "done";
barrier go:= true;
c:=i+1;
d:="step";
v:=d;
io.print(v);
i:=c;
redo go:= i<2;
exit go;
io.print(b);
optimizer.aliasRemoval();
the last optimizer.aliasRemoval() is used for optimizing?
On 11-08-2010 15:25:15 +0800, kun ren wrote:
> Recently,I am intersting in MAL optimize，and have read the manual of the
> MAL optimize, but it is so long, Possible if we want to use mal optimize ,we
> must degignation the optimize consideration, such as alias removal,
> constant expression,jo
Dear everyone,
Recently,I am intersting in MAL optimize，and have read the manual of the
MAL optimize, but it is so long, Possible if we want to use mal optimize ,we
must degignation the optimize consideration, such as alias removal,
constant expression,join path optimizer;And then I dedug the
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